.
I've read about group firing one group and chainfiring another group, but I can't find any explanation of it anyware

Can someone list all the modes of chainfiring.? Or tell me where I should have found it by myself.

I keep running across things I didn't see in the manuals or in any of the many guides on this site.

I bought the SYBEX book, and it didn't have anything on this either. If there is a place to find this info, could someone please tell me where it is?
.

Try this link. I was having a similar problem when I first started playing.

I read in a guide about infighting and got interested in trying the tanatos with 3CLBX10 cannons and 1 ERLL. I am playing (at times) MWMercenaries, and went on testing a little this setup in single player. Because I play with mouse, I only have 5 buttons to use for weapon fire, so I put the 3LBX on 1 button, the laser on another, and then split 1lbx on one button and 1lbx on another (mouse wheel up and mouse wheel down). Started a coloseum heavy match, and by chance I did a mouse wheel up and then a mouse wheel down, then pressed fire button 1, and this was the tricky part, again fire button 1. By this time first lbx was reloaded, so I went on chainfiring the lbx on one button... Now, in single player, is hardly having an impact on my opponents... I would be interested how this will work online... Since I don't dedicate lots of time to MW, I didn't tested this and it will be a while till I'll do it... Any one tested this? How it performes?